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Naddika [18.5K]
3 years ago
14

Help please! have a good day :))

Mathematics
2 answers:
scZoUnD [109]3 years ago
4 0

Answer:

D

Step-by-step explanation:

At most means that he didn't go over the amount of $4,000, but could gotten less. That means the anything less than or equal to $4,000, is what he made.

Troyanec [42]3 years ago
3 0

Answer:

D

Step-by-step explanation:

It's D because the business man made the most 4,000

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Write the equation of the sphere in standard form. x2 + y2 + z2 + 8x − 6y + 4z + 20 = 0
Nuetrik [128]

Answer:

(x+4)^2 + (y-3)^2 + (z+2)^2 - 3^2 = 0


Step-by-step explanation:

You have to find a, b, c, r so that the polynomial expands to match the given equation.

(x-a)^2 + (y-b)^2 + (z-c)^2 - r^2 =\\x^2-2ax+a^2+\\y^2-2by+b^2+\\z^2-2cz+c^2-r^2 =\\ x^2 + y^2 + z^2 + 8x - 6y + 4z + 20

(a^2+b^2+c^2-r^2-20)+\\x(-8-2a)+y(6-2b)+z(-4-2c)=0

-8-2a=0, 6-2b=0, -4-2c=0\\a=-4, b=3, c=-2

(-4)^2+3^2+(-2)^2-r^2-20 = 0

16+9+4-20=r^2

r^2=9

r=3

(x+4)^2 + (y-3)^2 + (z+2)^2 - 3^2 = 0



5 0
4 years ago
One-third of a number is 7. Find the number.
Paraphin [41]

Answer:

21

Step-by-step explanation:

21/3 = 7

6 0
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What is the value of x + 186 when x = -21
fredd [130]

Answer:

165

Step-by-step explanation:

-21+186=165 .....

7 0
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alexandr1967 [171]
It’s d!!!!!!!!!!!!!!
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